The presidential campaign has been repeatedly buffeted by religion, and faith will take the spotlight again this weekend as rivals Barack Obama and John McCain make a pilgrimmage to the influential Saddleback Church to woo its best-selling pastor, Rick Warren. The two candidates will make a joint appearance at the southern California mega-church to be grilled by Warren, the author of "The Purpose Driven Life." Sen. Obama, D-Ill., will go first, while Sen. McCain, R-Ariz., waits in another...Full Story